Not even going to ask you the costs for all that
I'll share; haven't done it yet, so still shopping. The "big shops" (Sarasota and Gulf Coast want around $25,00-$27,000 all-in to install a single GNC-355, a pair of GI-275's and rip out the vacuum system. It's the labor that kills you. They're quoting 84 hours of labor at one place and 111 hours labor at another place. Seems really high to me, but then again I'm cluless on how much labor such an endeavor actually takes.
I'm checking with the local guys to see if they can do better than that.
It's not like I'm asking for a new panel. GI-275's literally use four screws and go in right where the old stuff came out. The TB-10 panel literally tilts down on lower hinges for easy access after removing some upper screws.
My stupid pilot brain says they just need to slide out the old ADI and directional gyro, rip out the vacuum system, put a block-off plate on the engine where the vacuum pump was, stick the GNC-355 in the stack (doesn't it just slide into a tray?), run the Garmin cables (Isn't all the Garmin stuff plug-n-play with itself with garmin-suppled harnesses?), hook up the antennas (plane already has a Garmin GPS WAAS antenna installed; I think there is a splitter that feeds both my current GTX-345 so they don't have to remove the interior and run another cable to install another GPS WAAS antenna), hook up the pitot static to the new GI-275's, run the wires to the autopilot (Single axis S-Tec 40 for roll control - but the Gamin GI-275 is factory designed to output to that), re-do weight and balance (or re-weigh aircraft and do the math), do pitot-static and transponder check, and BOOM! DONE! What am I missing? Does that labor really take 84-111 hours of labor?
Perhaps there's an avionics-experienced A&P / IA on the forum that can let me know if that labor and quote range is reasonable. Also, if any of you have had a good experience somewhere in the USA, I'm not opposed to a long cross-country to get the work done.
The labor is why I'm not even contemplating a G3X at this point...I think a new panel to add that piece would push the whole shebang up to ~$40,000+ for parts and labor, and I think that if I were to sell in the future, I might not get that investment back out, but I feel real good about dual GI-275's and a GNC-355.
Thanks in advance for any helpful input.
Shane